What I used: Epson 3D Glasses. Clear silicone sealant. Emery boards. Easy release masking tape. $35.99 lenses from Eyeglass Direct to fit their Texas frames – more about ordering from Eyeglass Direct at the end.
The lenses should fit inside the slightly depressed area on the back of the 3D glasses. File the top and bottom of the lenses until they fit properly. Not much is required.
Cover everything you don't want to get sealant on with tape. Position lenses with narrow strips of tape. To the left and right of each positioning tape, at both the top and bottom, put a small amount of sealant in the gap between the lenses and the frame. Not much is required. The sealant is a flexible but strong adhesive when cured.
When the sealant has cured, remove the tape and you have prescription 3D glasses that work perfectly and are much more comfortable than wearing two pairs of glasses.
This method can probably be used for other than Epson glasses.
I used Eyeglass Direct (eyeglassdirect.com) because it's easy to determine the size and shape of their lenses. Browse through their frames until you find one with lenses that you think might fit your frames. They show the lens dimensions and you can even print out an illustration of the frames they fit in. For Epson glasses, lenses that fit their Texas frames proved to be the correct ones.
Order lenses for “Your Own Frames.” When you do this they expect you to send in some frames. So, when you order, you must let them know that you want lenses-only to fit one of their frames.
The lenses should fit inside the slightly depressed area on the back of the 3D glasses. File the top and bottom of the lenses until they fit properly. Not much is required.
Cover everything you don't want to get sealant on with tape. Position lenses with narrow strips of tape. To the left and right of each positioning tape, at both the top and bottom, put a small amount of sealant in the gap between the lenses and the frame. Not much is required. The sealant is a flexible but strong adhesive when cured.
When the sealant has cured, remove the tape and you have prescription 3D glasses that work perfectly and are much more comfortable than wearing two pairs of glasses.
This method can probably be used for other than Epson glasses.
I used Eyeglass Direct (eyeglassdirect.com) because it's easy to determine the size and shape of their lenses. Browse through their frames until you find one with lenses that you think might fit your frames. They show the lens dimensions and you can even print out an illustration of the frames they fit in. For Epson glasses, lenses that fit their Texas frames proved to be the correct ones.
Order lenses for “Your Own Frames.” When you do this they expect you to send in some frames. So, when you order, you must let them know that you want lenses-only to fit one of their frames.
you deserve your own personal pair... 
